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VALIDITY, RELIABILITY AND DIFFICULTY INDICES FOR INSTRUCTOR-BUILT EXAM QUESTIONS
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5

August 2024

2024/2025

A+
To assess the reliability of the tests, we needed to use a number of experts to mark the exam papers in order that the marking does not affect the marker’s opinion( seif 2004). In this study, we asked two instructors to mark the exam papers separately and used Kendal agreement coefficient to check the agreement of the two markings. Difficulty Coefficient and Discriminant Coefficient Because all of chemistry exam questions were open questions, we used the following formula for calcul...
TIFFACADEMICS
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